Heat retention: 189˚f at 1 hr. / 160˚f at 6 hrs. ; cold retention: 46˚f at 6 hrs. Tight fitted flip-open lid keeps beverages hotter or colder, featuring a safety lock to prevent the lid from opening accidentally Easy-to-clean nonstick Coated interior Air vent on the mouthpiece allows for smooth Beverage flow without gushing or overflowing Made of BPA-free plastic and stainless steel